sop for Preventive Maintenance of cooling towers

1.0 Objective 
To lay down a procedure Preventive Maintenance of cooling towers.
2.0 Scope
This Standard Operating Procedure is applicable for Preventive Maintenance of cooling towers to be followed at formulation plants
3.0 Responsibility
3.1 Officer / Executive Engineering shall be responsible for the execution of this procedure.
3.2 Engineering Manager shall be responsible for the implementation of this SOP.
3.3 Head QA/designee shall be responsible for the compliance of this SOP.
4.0 Abbreviations and Definitions
SOP : Standard Operating Procedure
No : Number
QA : Quality assurance
ER : Engineering
5.0 Procedure
5.1 General Conditions
5.1.1 Refer the master plan of preventive maintenance.
5.1.2 Equipment shall be available for preventive maintenance.
5.1.3 Clean oil / grease stains & remove unwanted material, spares after completion of Work.
5.2 Precaution
5.2.1 Use necessary safety wears, while doing the work.
5.2.2 Ensure covers & guards are properly fixed.
5.3 Procedure for Preventive Maintenance of Cooling Tower.
5.3.1 Ensure that electrical supply is in off position in main panel and display “Under Maintenance’’ tag on the panel board.
5.3.2 Switch OFF the drive unit and inform all the concerned.
5.3.3 Operator or above has to ensure and verify the check points for the preventive Maintenance as shown in Annexure-1.
5.3.4 After the completion of preventive maintenance, check the machine for smooth Operation.
5.3.5 Remove “Machine under Maintenance” Board on the panel board after completion of the maintenance.
5.3.6 The operator / technician who perform the job will enter his name / sign in “Done By” Column and responsible Engineer/ Officer and Officer- Production will put sign in “Checked By’’ column.
5.3.7 Quarterly Preventive Maintenance is to be carried out as per the following check points:
5.3.7.1 Check the cooling tower fan motor foundation bolts.
5.3.7.2 Check the Cooling tower motor for any vibration.
5.3.7.3 Check the fan blades and tight the its locking bolts / mounting bolts.
5.3.7.4 Check the all electrical terminal connections and tighten the same.
5.3.7.5 Clean the cooling tower spray nozzles, if required clean the nozzles.
5.3.7.6 Check the proper earthing of motor.
5.3.7.7 Lubricate the motor bearing for any abnormal noise, replace if required.
5.3.7.8 Check the cooling tower blade clamps for any loose condition; if necessary tighten the all nut bolts and clamps.
5.3.7.9 Check the cooling tower pipeline butterfly valves for operation; if required lubricate the Valve handles with the oil or grease.
5.3.7.10 Check the condition of the cooling tower fan assembly.
5.3.7.11 Check the quality of fins if found damaged then replace them with new one.
6.0 Forms and Records
6.1 Quarterly Preventive Maintenance Check List of cooling tower – Annexure-1
7.0 Distribution
7.1 Master copy – Documentation Cell (Quality Assurance)
7.2 Controlled copies – Engineering department.